Improvement in weft-stop mechanisms for looms



UNITE STATES ATENT OFFICE.

' WILLIAM TAYLOR, OF MAYNARD, ASSIGNOR TO THE AMERICAN STOP- MOTION COMPANY, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN WEFT-STQP MECHANlSMS FOR LOOMS.

Specification forming part of Letters Patent No. 146,61S, datcd January 20, 1874; application filed October 27,'1e73.

To all whom it may concern:

Be it known that I, WILLIAM TAYLOR, of Maynard, in the county of Middlesex and State of Massachusetts, have invented a certain new and useful VVeft-Stop Mechanisln for Looms, of which the following is a specification:

,'Heretofore weft-stop motions have not practically stopped the lay instantly, but have allowed it to be impelled by its own momentum, and that of other parts, so far as to change the shed and add a pick before it really comes to a stop, thus impairing the utility of the stop-motion.

The object of my invention is to make a practical and instantaneous weft-'stop motion 5 and consists in combining, with a lay of a loom, a positive stop-motion device, said device consistin g of a detecter for the weftthread, which connects by direct mechanism with a swinging dagger attached to the lower side of the lay. This dagger is so arranged, in connection with the shipping-lever and a check on the breast-beam, that in case the weft-thread is absent the dagger will strike the knock-olf lever, throwing off the belt, and at the same time be stopped by the limited motion of the knock-oit' lever, vwhich motion is arrested by a check on the breast-beam, thus bringing the tla y of the loom to a sudden stop.

Figure. l is a plan, showing a part of the breast-beam and lay, with my improvement connected. Figs. 2 and 3 are vertical sections of the same. Fig. 4 is a perspective view, showing a part of the device for throwing off the shippinglever.

D F, Figs. l and 3, represent the detecter, consisting of a liked grill, I), set in the lay, and of a swinging grill, F, attached to the rod C at the rear of the lay. These grills are attached at each end of the lay, and are arranged to operate as weft-detecters, in the usual manner. To the rod C, I attach a bent arm, H I, which swings with the said rod, and communicates motion, through the extension K, to the lever-dagger L', as shown in Figs. 1, 2, and 3. This dagger L' is made strong, and rmly attached by a pivot, L, to the front of thelayA,

or, if desirable, to the` protector-rod. M M1 (shown in full at Fi 1) is a bent knock-olf lever hun g on the under side of the bealn. The end Ml of this lever acts in a notch or against a collar made in or on the slide M2, and causes it to partake of its'motion. This slide terminates in an incline, (shown atM3, Fig'. 4,) which incline, acting on the shipping-lever T, throws the same out of the catch S, and thus ships the belt and stops the loom. I), Figsl, 2,and 8, is a check fastened to the under side ofthe breast-beam, and so placed as to limit the motion of the knock-ott' lever M, and through this lever to arrest the forward motion of the dagger L', thus causing the lay to stop instantly.

The operation of my invention may be` described as follows: The grill F is arranged,V as usual, to fall at each forward stroke of the lay. The lever I-I I is so adjusted on the rod O,tl1at if the grill F falls through the ixed grill l), as it will in case the weft-thread `is absent, it will allow the extension K of the lever-dagger L' to drop so far as to raise the dagger L'into the position shown inl Fig. 2-that is, so as to strike the knock-olf lever M, which will, through the slide M2, Src., ship the belt, and the lever M, being stopped in its forward motion by the check I, directly arrests the forward motion of the dagger L', and oonsequentlythe lay A. In case the weftthread g is on the grill, as represented in Fig. 3, then the lever H I will hohl the dagger L', so that in the forward motion of the lay it will pass clear of the lever M and check l?, and allow the continued motion of the loom. i

I claim as my invention- The combination of the weft-stop mechanism F C I-I I, the lever-dagger K L', the knock-olf mechanism M M1, and the check l?, all operating together substantially as described, and for the purpose set forth.

WILLIAM TAYLOR.

Witnesses FRANK G. PARKER, J. S. UONANT. 

